Rover MEMS Mpi ECU Pin Out (Not Fully Complete or Checked)
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| 1 | From Fuel Injector No. 4 | |
| 2 | From Stepper Motor Ph. 2 | |
| 3 | From Stepper Motor Ph. 1 | |
| 4 | From Main Relay Coil (Relay Terminal 85) | |
| 5 | Lambda Sensor Heater Relay Coil ??? | Black-Green |
| 6 | ||
| 7 | From Lambda Sensor | |
| 8 | Throttle Position Sensor (TPS) Signal | |
| 9 | Throttle Position Sensor (TPS) +ve supply | |
| 10 | Serial Diagnostic Output | White-Yellow |
| 11 | Fused Power supply from Ignition Switch | White-Pink |
| 12 | ||
| 13 | Throttle Pedal switch (if fitted ?) | |
| 14 | Earth Ground to battery -ve terminal (on automatic transmision models via park/neutral switch ?) Ground connection for Screened Leads on CAS & Lambda sensors (may also ground MFU ?) |
Black |
| 15 | Serial Diagnostic Input | Black-Green |
| 16 | Air Temp Sensor Signal | |
| 17 | Knock Sensor (KS) -- not fitted to all Rover models | |
| 18 | From Lambda Sensor (Earth Return ?) | |
| 19 | From Air Conditioning | |
| 20 | From Fuel Pump Relay Coil (relay terminal 85) | |
| 21 | CFSV Purge Valve | |
| 22 | From Stepper Motor Ph. 3 | |
| 23 | From Fuel Injector No. 2 | |
| 24 | From Fuel Injector No. 1 | Yellow-Brown |
| 25 | From Coil and Tachometer ( ie: "contact breaker") | White-Black |
| 26 | From fuel injector No. 4 | |
| 27 | From Stepper Motor Ph. 4 | Orange-Blue |
| 28 | +12 volts Power from Main Relay (relay terminal 87) | |
| 29 | Main Ground | Black |
| 30 | Ground to Sensors (CTS, ATS, TPS, FRTS) ??? | Pink-Black |
| 31 | Crank Angle Sensor (CAS) (AC Signal) | Blue-Purple |
| 32 | Crank Angle Sensor (CAS) (AC Signal) | White-Blue |
| 33 | Coolant Temp Sensor Signal | Pink-Green |
| 34 | Fuel Rail Temperature Sensor (FRTS) | |
| 35 | From Air Conditioning | |
| 36 | From Oxygen Sensor Heater Relay Coil (relay terminal 85) |